BCTLLlIDi. 
347 
Chiloscyllium fossile, J. Probst, Wurtt. Jahresh. toI. xxxv. (1879), 
p. 171, pi. iii. fig. .30. — Molasse; Baltringen, Wiirtemberg. 
Genus CROSSORHINUS, MiiUer & Henle. 
[Syst. Beschreib. Plagiostom. 1841, p. 21.] 
First dorsal fin behind the pelvic fins, and the second in advance 
of the anal, which is very close to the caudal. Tail short. Head 
broad and flat, with lateral appendages of skin ; mouth wide, nearly 
terminal ; eyes small ; the spiracle a wide oblique slit, behind and 
below the eye. Teeth comparatively few and largo, the middle 
portion of the anterior coronal face extending downwards as a pro- 
cess over the root. Anterior teeth long, slender, subulate ; lateral 
teeth less elevated, tricuspid. 
Some of the teeth are scarcely distinguishable from those of 
Squattna, and no fossil examples have hitherto been recorded. 
A vertebra from the “ Gault ” (? Cambri dge Greensand) of Cam- 
bridge is supposed to belong to Crossorhirms by C. Hasse, Ifatiirl. 
Syst. Elasmobr., Besond. TheE (1882), p. 200, pi. xxv. figs. 7-10. 
Genus CANTIOSCYLLIUM, nov. 
Syn. 8cyUiodu», L. Agassiz, Poiss. Foss. vol. iii. 1843, p. 377 (in part). 
Teeth robust, with a broad depressed root, flattened and scarcely 
divided into two radicles. Dental crown consisting of a single 
elevated principal cone, with one or two pairs of small lateral cones ; 
the anterior coronal face produced downwards and forwards 
raesially. Vertebr® large, deep and short in the abdominal region. 
The character of the dentition suggests affinities with Oitujly- 
fnostoraa. Before any teeth had been exposed, however, the type 
specimen of the only known species had been theoretically associated 
■with the remains of a distinct fish (Scyllium antiquum, p. 340), to 
form a “ genus ” named ScylUodus. 
Cantioscyllium decipiens, sp. nov. 
'^ype. Head and anterior portion of trunk ; British iluseum. 
Teeth striated. 
Form. ioc. Turonian : Kent. 
• 5890. The type specimen, consisting of the imperfect mandi- 
bular and hyoid arches, pectoral arch, and the anterior 
portion of the vertebral column, figured by Agassiz, tom. cit. 
pi. xxxviii. fig. 2 (^ScylUodus aniiquus) ; Lower Chalk, 
Burham, Kent. Several teeth have been exposed by the 
